Door lock



R. C. CLARK DOOR LOCK Sept. 18, 1951 2 Sheets-Sheet 1 Filed June 18, 1948 2 INVENTORI filLP/I (2 am? %%udzqflumm;tmm

R. C. CLARK Sept. 1 8 1951 DOOR LOCK 2 Sheets-Sheet 2 Filed June 18, 1948 INVENTOR.

RAIPH C. (LARK nrromwsrs Patented Sept. 18, 1951 DOOR LOCK Ralph 0. Clark, Willowbrook, Calif., assignor to Ray E. Clark, Willowbrook, Calif.

Application June 18, 1948, Serial No. 33,882

2 Claims. 1

This invention relates to improvements in door locks, and more particularly to a lock adapted to be set into a rectangular notch or mortise opening provided in a door and opening to one edge of the latter.

It is among the objects of the invention to provide an improved door lock which may be set into a rectangular notch or mortise'opening in the edge of the door and clamped to the door by the same fastening elements which secure the parts of the lock together in operative assembly, which can be .completely assembled with the use of not more than four screw fasteners, can be simultaneously assembled and mounted in a door in a minimum amount of time, is simple, strong and durable in construction, economical to manufacture, and neat and attractive in appearance.

Other objects and advantages will become apparent from a consideration of the following description and appended claims in conjunction with the accompanying drawings, wherein:

Figure 1 is a somewhat diagrammatic perspective view showing a lock illustrative of the invention partially assembled with a door;

Figure 2 is an exploded perspective view of the lock illustrated in Figure 1;

Figure 3 is an exploded perspective view of a knob-and-spindle assembly constituting a portion of the lock illustrated in Figures 1 and 2;

Figure 4 is a transverse medial cross-section through the lock illustrated in Figure 2 with the lock in operatively assembled condition;

Figure 5 is a longitudinal medial cross-section through the lock and a fragmentary portion of a door in which the lock is mounted;

Figure 6 is a cross-section perspective of the knob-and-spindle assembly illustrated in Figure 3;

Figure '7 is a longitudinal cross-section through a latch bolt housing and latch-operating spindle showing the parts in one latch-retracting position; and

Figure 8 is a view similar to Figure '7, showing the parts in a different latch-retracting position.

With continued reference to the drawings, the numeral [0 generally indicates a conventional door having a rectangular notch or mortise opening'll therein, opening to the free edge of the door.

The improved lock is especially designed to fit into such a rectangular notch or mortise opening in the door and comprises a pair of plates I3 and I4, a spindle assembly, generally indicated at iii, a latch bolt and latch bolt housing assembly, generally indicated at it, and a pair of knobs l1 and I8.

The rectangular side plate I3 is somewhat larger than the lock-receiving opening in the door and is provided substantially centrally thereof with an apertured boss 2C within which is a semi-circular tongue '2! for releasably securing the spindle assembly in operative position in the lock, as will later appear. Four legs 22, preferably of rectangular cross-section extend perpendicularly from the side of plate l3 opposite the boss 20 near the respective corners of the plate, and a pair of opposed, spaced-apart ribs or keys 59 project outwardly from the plate intermediate the length thereof substantially parallel to the legs 22. Each leg 22 is provided in its end opposite the plate I3 with a screwthreaded well as which wells receive respective screws 2 insertable through corresponding screw-receiving apertures 25 in plate M.

The two plates l3 and it are somewhat larger than the lock-receiving opening in the door so that when the plates are secured in operative assembly by the screws 24, the plates marginally overlie the door around the notch i l and are held by the screws in clamping association with the door to firmly secure the lock in operative assembly with the door.

Plate It has a substantially central spindlereceiving opening 26 therein, a slot 21 extending outwardly from the aperture at one side thereof, and terminating in a cross portion or T 28 and with a dead-bolt-pin-receiving aperture 29 adjacent the aperture 26.

The latch bolt and latch-bolt-housing assembly it comprises an elongated, hollow housing 33 of rectangular cross-section having adjacent one end thereof oppositely-disposed grooves 31 which slidably receive the keys or ribs H) to operatively secure the housing to plate IS. The housing 30 is provided at its opposite end with a perpendicularly-extending, rectangular plate 32 of a size and shape to overlie the open end of notch it between the corresponding ends of the side "plates I3 and 14. Plate 32 is provided on its upper and lower edges with outwardly-extending, apertured, rectangular tongues 33 which are received in recesses 34 provided in the edge of the door above and below the notch H, and receive wood screws 35 for firmly securing the "latch-bolt housing to the door. These two small .wood screws 35 are the only screws which are screwed into the material of the door to secure the latch thereto, and these may be omitted with- .out, in any way, affecting the scope of the invention. Plate 32 is also provided with a central, rectangular aperture 36 for the latch bolt 3?. Latch bolt 31 is an elongated member of rectangular cross-section having a beveled end 38,

a substantially rectangular aperture 39 in its opposite end extending beyond the adjacent end of the housing 38, an elongated spring-receiving slot 40 therein and a small pin-receiving slot 4!. Between the slot 48 and the aperture 39 the latch bolt is provided with a pair of dead-boltpin-receiving apertures 42.

A coiled compression spring 43 is received in the slot 48 and bears at its forward end against the end of the slot and at its rearward end against an abutment plate 44 slidably received in the slot and extending through abutment plate apertures provided in the opposite side walls of the housing 30, so that the spring acts to resiliently urge the latch bolt out of the latch bolt housing to the operative, keeper-engaging position, illustrated in Figures 1 and 2. Pin 45 secured in the opposite side walls of the housing and extending through pin slot 4| limits the movement of the latch bolt 37 relative to the latch bolt housing 30, so that the latch bolt can be moved between its extended and retracted positions, but cannot be moved beyond either one of these posi tions without first removing the pin 45.

The operated spindle assembly it: comprises a first or knob spindle 45 having an elongated portion 4? of semi-circular cross-section which extends through the lock between the side plates |3-and l4. This spindle 46 has, adjacent one end thereof, a groove 48, which receives the semicircular tongue Zl in plate Hi to lock the spindle in operative assembly in the plate. The tongue may be engaged in the groove by inserting the spindle through the plate in a position 180 degrees out of its operative position and then rotating it until the key is engaged in the groove. At said one end, the spindle is provided with an outwardly-extending, semi-circular flange 49 received in the knob l! in a manner which will presently appear.

An elongated, co-axial stem 56 of non-circular, preferably rectangular, cross-section extends from the end of spindle 46 opposite flange 49 to receive knob l8 thereon and the spindle 46 is provided in its fiat or diametrical face with an elongated, semi-cylindrical recess adjacent the end from which the stem 58 extends, and a semi-cylindrical recess 52 of smaller diameter than the recess 5| extending from the adjacent end of recess 5| to the flanged end of the spindle.

A second or key operated spindle 53 has a semi-cylindrical portion 54 received in the recess 5| and held against longitudinal movement relative to the spindle 46 by the abutment of its end 55 with the internal shoulder 56 in spindle 46 between recesses 5| and 52. Spindle 53 also has a cylindrical shank 57 partly receivable in the recess 52 and provided at its end opposite the semi-cylindrical portion 54 with a socket 58 having a transverse aperture therethrough. Knob H is provided in the end thereof received in boss 29 with a semi-cylindrical abutment 58 the diametrical face of which abuts the diametrical face of the semi-cylindrical flange 49 on spindle 46 so that spindle 46 will be rotated whenever knob I! is rotated.

A lock tumbler barrel BI is secured in an axial bore in knob H and has at its outer end a knotretaining flange 59. This barrel receives a key cylinder 62 having on its inner end a rectangular apertured lug 63 received in the socket 58 provided on spindle 53 and secured therein by suitable means, such as the transverse screw 63. Screw 63 secures knob I! to spindle 53 which is,

in turn, secured to spindle 46, as explained above, so that the knob is held in operative association with the lock by the spindles 46 and 53.

In assembling the lock, a sub-assembly is first made by placing the key cylinder 62 in the tumbler barrel 6|, placing the lug 63 of the key cylinder in the socket 58 of the key-operated spindle 53 and inserting the screw 63 through the lug and the socket to secure the tumbler barrel and key cylinder to spindle 53. The key cylinder has a flanged end opposite its end carrying the lock 63 so that the key cylinder cannot pass through the tumbler barrel. The spindle 53, tumbler barrel 6| and key cylinder 62 are then passed through the tumbler barrel-receiving bore in the knob H from the outer end of the knob until the socket on the key-operated spindle bears against the semi-circular abutment 60 in the end of the knob, which maintains the lock barrel assembly and key-operated spindle against passing through the knob. Knob-operated spindle 46 is now assembled with the key-operated spindle 53 and knob I! by inserting the end of spindle 46 carrying flange 49 in the knob bore at the inner end of the knob, so that the diametrical face of spindle flange 49 is opposed to and substantially in contact with the diametrical face of the semi-circular abutment 60 in the knob bore at the inner end of the knob, and then placing the semi-cylindrical portion 54 of spindle 53 in the semi-cylindrical recess 5| in spindle 46. This completes the first sub-assembly.

The knob I8 is now assembled with plate l4. This knob has a cylindrical arbor 64 rotatable in the plate aperture 26. At the inner end of this arbor the knob I8 is provided with an annular shoulder which bears against the outer side of plate M to limit movement of the knob inwardly of the plate and the arbor 64 is provided in its outer end with an annular groove. The arbor portion 64 of knob I8 is inserted through aperture 46 in plate I4, a thrust washer 65 is placed on the arbor portion at the inner side of the plate, and a split, circular snap ring 65 is placed in the annular groove in arbor portion 64 to lock knob I8 to plate l4 while permitting free rotation of the knob relative to the plate. This completes a second sub-assembly.

The latch bolt and latch bolt housing assembly with movement-limiting pin 45 omitted is now assembled with the plate l3 by sliding the portion of housing 30 having the grooves 3| therein between the ribs I9, care being taken to see that the latch bolt is beveled in the proper direction for the particular door. This completes a third sub-assembly.

The two spindles 46 and 53 are now inserted through the apertured boss 28 on plate I3 and through aperture 39 in latch bolt 31, and are rotated from their normal operative position so that the flat sides of the two spindles will pass by the diametrical face of the semicircular tongue 2| in boss 28 until groove 48 in spindle 46 is opposite tongue 2|. To permit this rotation of the spindles, latch bolt 31 is retracted into housing 30 beyond its normal limiting position. After groove 48 is brought opposite tongue 2|, the two spindles 46 and 53 are rotated to seat tongue 2| in groove 48. This releases latch bolt 31 for movement to a position within its normal range of movement, and pin 45 is now inserted so that the spindles cannot be rotated to a posi tion to release spindle 46 from tongue 2|. Knob l1 and spindles 46 and 53 are now secured to plate l3 along with latch assembly I6 and this completes a fourth sub-assembly.

Knob I8 is provided with a bore 61 of noncircular cross-sectional shape opening to the end of the knob on which the arbor portion 64 is provided, which bore receives the stem 50 on spindle 46. The second sub-assembly is now assembled with the fourth sub-assembly by entering the outer end of stem 50 in the bore 61 in knob l8 and bringing plate I4 to bear at its corners on the ends of legs 22 remote from plate l3, plate l4 being so positioned that the dead pin aperture 29 in this plate overlies one of the dead pin apertures 42 in latch bolt housing 30. Screws 24 are now inserted through respective apertures 25 in plate I4 and threaded into the screw-re ceiving wells in legs 22. This completes the assembly of the lock, and the lock may now be assembled with a door by placing the lock in a lock-receiving notch in the door before the screws 24 are fully tightened, and then tightening the screws to cause the plates l3 and M to clamp the door between them.

Knob I8 is provided in the portion thereof received in plate l4 with one or more radial apertures 68 and a dog 69 is slidably mounted in slot 21 and has a pointed end engageable in an aperture 68 to secure knob l8 against rotation.

By this means it is possible to lock the knob l8 and spindle 36 against rotation, so that the latch bolt 31 cannot be withdrawn by operation of either knob.

The manner in which the latch bolt is withdrawn by the knobs rotating spindle 46 is particularly illustrated in Figure '7, wherein both spindles are shown rotated in the latch bolt aperture 39 to a position at which the latch bolt is retracted into the housing 30.

When the knobs are locked by operation of dog 69, as explained above, the latch bolt 31 may still be retracted by use of a key in key cylinder 62 to rotate the second or key operated spindle 53, as illustrated in Figure 8. As shown in this figure, although spindle 46 is held against rotation, spindle 53 is rotatable in the aperture 39 to retract the bolt.

A dead bolt pin is provided slidable through a recess 29 in plate l4 and through one of the apertured sleeves H projecting from the latchbolt housing 30 for the plate l4, and into a corresponding dead-bolt-pin hole 12 in the latch bolt. When pin 10 is pushed inwardly into the corresponding hole 12, the latch bolt cannot be retracted either by the knobs or by a key.

If it is desired to dispense with the use of a key, a blank or dummy key cylinder may be substituted for the key cylinder 62 and forced into the barrelBl so that it is frictionally held against rotation in the barrel, whereupon the two spindles 46 and 53 will be held in the relative position illustrated in Figure 7 and the spindle 53 will not be operative to retract the latch bolt when the spindle 46 is locked against rotation.

As certain parts of this lock are similar to corresponding parts in my copending application Serial No. 14,419, filed March 12, 1948, for a Door Lock, reference may be had to such copending application for a more detailed description of such parts.

The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiment is, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are, therefore, intended to be embraced therein.

What is claimed is:

1. In a door lock, a first rectangular plate having a spindle receiving opening therein, legs extending perpendicularly from one side of said plate and disposed one at each corner of the plate and spaced inwardly from the adjacent plate edges, each of said legs having therein a longitudinally extending well internally screw threaded and opening to the end of the corresponding leg remote from said plate, and a pair of mutually opposed ribs projecting perpendicularly from said one side of said first plate adjacent said spindle receiving opening and spaced apart to receive a latch bolt housing therebetween, a rectangular latch bolt housing received at one end between said ribs and having in respectively opposite sides thereof transversely extending grooves slidably receiving the adjacent edge portions of said ribs, a second rectangular plate having screw receiving apertures disposed one near each corner thereof, and screws extending through the apertures in said second plate and threaded into the wells in said legs to hold said plates in assembled relationship at the respectively opposite sides of a door, said second plate having therein an opening aligned with the opening in said first plate and adapted to rotatably receive an end of a door knob.

2. In a door lock, a first rectangular plate having a spindle receiving opening therein, legs extending perpendicularly from one side of said plate and disposed one at each corner of the plate and spaced inwardly from the adjacent plate edges, each of said legs having therein a longitudinally extending well internally screw threaded and opening to the end of the corresponding leg remote from said plate, and a pair of mutually opposed ribs projecting perpendicularly from said one side of said first plate adjacent said spindle receiving opening and spaced apart to receive a latch bolt housing therebetween, a rectangular latch bolt housing received at one end between said ribs and having in respectively opposite sides thereof transversely extending grooves slidably receiving the adjacent edge portions of said ribs, a second rectangular plate having screw receiving apertures disposed one near each corner thereof, screws extending through the apertures in said second plate and threaded into the wells in said legs to hold said plates in assembled relationship at the respec tively opposite sides of a door, said second plate having therein an opening aligned with the opening in said first plate and adapted to rotatably receive an end of a door knob, and an annular boss on the other side of said first plate surrounding said spindle receiving opening and adapted to rotatably receive an end of a door knob complementary to the first mentioned door knob.

RALPH C. CLARK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 812,904 Voight Feb. 20, 1906 2,304,941 Mantz Dec. 15, 1942 

